EcoFlowSpecification analyzed
EcoFlow Delta Pro 3
DEP3-4001
The reference home-backup platform.
EcoFlow's flagship whole-home backup beast — 4 kWh LFP, 240V, 4000W continuous, big solar input.
Released 2024All EcoFlow reviews
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78
Strong · /100VerdictStrongly recommended
Capacity4,096 Wh
Output4000 W
Weight115 lb
Best for
Home backup for essentials through whole home at 240V; expandable up to 12kWh
Avoid if
Don't have the budget for a large home-backup system
What It Can Run
- Refrigerator for ~10+ hours
- Sump pump and furnace
- Window air conditioner on essentials
Runtimes assume inverter efficiency, depth of discharge and a duty cycle for compressor appliances. See the runtime calculator for exact estimates.
Performance Breakdown
Usable capacity
84
Inverter output
100
Charge speed
100
Solar input
100
Battery longevity
64
Portability
0
Overall value
72
Warranty
80
Ports & expandability
95
By Use Case
One product ranks differently for each scenario — see where this one fits.
Home Backup
87
Camping
55
RV Travel
80
Solar Use
81
Full Specifications
Battery capacity4,096 Wh
Usable capacity3,500 Wh
ChemistryLiFePO4
Cycle life (80%)4,000 cycles
Inverter output4000 W
Surge output8000 W
Wall recharge0.83 hr
Solar max input2600 W
AC outlets6
USB-C ports3
USB-A ports2
12V carport1
DC outputs1
Weight115 lb
Dimensions19 x 11 x 24
ExpandableYes
UPS functionYes
App controlYes
Warranty5 yr
Release year2024
Pros & Cons
Pros
- 240V split-phase output
- 6 AC + 3 USB-C
- Massive 2600W solar input
- Expandable to 12kWh
- Fast 80% wall charge
Cons
- Heavy (115 lb)
- Very expensive
- Batteries sold separately for expansion
Major weaknesses: Very heavy · Premium price.
Final Recommendation
Strongly recommended
The reference home-backup platform.